You mean GUI responsiveness?  Most of the content will be on staggered timers and doesn't need to be updated in real time.  Graphs and things for example can be updated every 10 seconds or so.  

The actual update of the graphs, tables, fetching data etc will happen in separate threads from the painters and use double buffer caching, so fluidity of the user inputs should be pretty good and the display components can still be navigated while new data is being prepared, then flipped.  If its not, well, I'm pretty good at optimizing things and finding novel ways to get them fast

BTW:  Best graphic designer in the universe? Nice  Take a look at this little competition we are having https://forum.emunie.com/threads/competition-debit-card-designs.4439/